Short answers, pulled from the story.
Nordisk familjebok is a Swedish encyclopedia published in print from 1876 to 1993 across five editions and dozens of volumes. Its name translates as Nordic Family Book. The encyclopedia is now fully available in digital form via Project Runeberg at Linköping University.
Five editions of Nordisk familjebok were published. The first ran from 1876 to 1899 in 20 volumes; the second from 1904 to 1926 in 38 volumes; the third from 1924 to 1937 in 17 volumes with three supplements; the fourth from 1951 to 1957 in 22 volumes; and the fifth appeared in 1993 in two hardcopy volumes plus a CD-ROM edition.
Uggleupplagan is the popular name for the second edition of Nordisk familjebok, published between 1904 and 1926 in 38 volumes. The nickname comes from the owl image on its cover. It is considered the most comprehensive encyclopedia ever published in the Swedish language, and more than 20,000 articles on Swedish Wikipedia are based on it.
The first three editions of Nordisk familjebok are in the public domain and freely available. The fourth edition from the 1950s and the fifth edition from the 1990s remain under copyright.
The public domain editions of Nordisk familjebok remain important reference works in Finland, where Finnish Wikipedia in particular continues to rely on them. The full text of the earlier editions is freely accessible online through Project Runeberg at Linköping University.
A linguist and editor named Linder was hired in 1874 to launch Nordisk familjebok. Linder designed the editorial team, recruited contributors, and shaped the articles until 1880, when he was succeeded by Theodor Westrin, a lexicographer and first archivist at the National Archives, and by B. F. Olsson.